1 2 3 n 1 division of vernier scale n division of main scale 5 one Vemier division n 1 main scale division 1 Least count 1 M S D 1 V D n 1M S D n 1M S adding i and ii Mg V For an object placed at infinity the image after first refraction will be formed at v 462 462 by R 1 The image after second refraction will be found at H3 H2 H3 H2 V V R HgR bbg jy R Therefore focal length will be s Hy 2 1 Rhc 7 2 hv 2 1 3RC SOLUTIONS Mg py R Z 42 Loss in K E of the gas where n number of moles If its temperature change by AT Then n RAT nm v mv AT 3R V v sincsti v cos cxtj n 1 AE nm f